VU THI TUONG MINH, PHAM ,QUY MƯƠI. Tangential method for creating and finding limits of functions. The University of Danang - Journal of Science and Technology, [S. l.], v. 18, n. 1, p. 68–74, 2020. Disponível em: https://jst-ud.vn/jst-ud/article/view/2566. Acesso em: 18 may. 2024.